The insider added: “Jamie was very concerned about his marriage and had become aware of Louise sending text messages Kevin.

Louise and Kevin’s respective partners were said to be concerned about their friendship. Copyright: [BBC]

“He made the decision to call Karen without Louise’s knowledge, which was a very hard thing for him to do.

“He asked Karen if he thought their partners were having an affair.”

Louise and Jamie separated in the months following the former singer’s stint on Strictly, with the star admitting that the show, and her subsequent friendship with model Daisy Lowe, gave her a new lease of life.

The two reportedly struggled to spend time together due to their gruelling Strictly commitments, with Karen splitting her time between London and Manchester and Kevin London and Glasgow, where his celebrity partner, Susan Calman, lives.

Kevin and Karen’s marriage is said to be under strain. Copyright: [Rex]

A show insider previously said: “Kevin has spoken to some of those close to him and admitted things aren’t going well between them at the minute.”